Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ef2f575adc0ca0c4ae581cb9d1465ca3c995d153733ebd3d329bfddc5bb34d8' 
  AND token = 'tXfQiGvDClcy06FGeKeZ/uEIZUuCL6uac4QBbGbGMBY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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