Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9ca09b4c330644ad433afb4a3391a04e0759a41f537c8a93031b161f5d35bc4' 
  AND token = 'P5TSb5xPFi7vL23xS4ND0NWBttZhhn/0cvg4FBgqIHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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