Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '287e9a10083d9ffe761e1cfabdb344872468b9a87ae8b8340e9be1ce125ab793' 
  AND token = '3iHmaxS75FvberQaSjnbpcNUon9JxThy3So9izehkPU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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