Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed89c04464240e452469eb92122382057e0dc346588aad09d7ee02ff09b94618' 
  AND token = 'vjLywnWUbSdDyAaBfVhVK7Mkl1qevXdTaJn3aqpkg6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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