Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a597229fd62e46bec190892c249bd0cf20656f07261044f69cbfc56b6b7da7cf' 
  AND token = 'fFhj7MfaUWKrL/nMIdF2dQKmw4wVJoonvoUQnmSCGfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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