Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd262abd438c403dc203c0eb30706707c5d0710e522a763ceaad142c53b34137f' 
  AND token = 'T2baWauked1CI78kXTXzJY0fS3hY8YNVRaRTOkmggm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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