Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddbd3a571c9d554770bf6f3df39d37a5eafc317cda01f1ab2a993a4db51803de' 
  AND token = 'M6BBZesgqdcmdy5zhl0fUcRW6glCDm2bBzrhxkhlZls=' 
  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"
    }
  }
}