Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d11b4ba6169873567bd01b05816851d758a0294574b54419fa2e6e18ddd225a' 
  AND token = 'h8bevsoDZ/bWWWnvPbh/lg7fSF9kXBcrBE5yinbhnKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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