Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3264359ef5d2a775eaa556fe1bcad4833529f4faf0ded09b8bb83ebe4cb39eda' 
  AND token = 'CMTDxUepBMQ2nIUWPv0UkH1gDjPsN87XpIJfAjLU27Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}