Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0157cb07b7aea4fe2a4cbb09d80d89cfd100283b690962b0fb5ef9cd530fcf49' 
  AND token = 'COJqTRo027MGVayfCM3KYEfxxR3nqC9o93mVNIkbZ9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}