Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2188f5986e6b9d41b94b1a24c295bf5bfca5330366091df794c240edda8c124' 
  AND token = '3Mqb43A+0ZTDiuSZbGB9z24PxuZIJcuFC4eZr7ZuZhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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