CREATE TABLE email_verification_tokens (
    id BIGSERIAL PRIMARY KEY,
    user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    token VARCHAR(255) NOT NULL UNIQUE,
    expires_at TIMESTAMP NOT NULL,
    used BOOLEAN NOT NULL DEFAULT FALSE,
    created_at TIMESTAMP NOT NULL DEFAULT NOW()
);

CREATE INDEX idx_email_verification_tokens_token ON email_verification_tokens(token);
CREATE INDEX idx_email_verification_tokens_user_id ON email_verification_tokens(user_id);
CREATE INDEX idx_email_verification_tokens_expires_at ON email_verification_tokens(expires_at);