Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '776fa8a9bba875756470a06f3530e65cdc08d170fa719218d0656d69603263bb' 
  AND token = '/bX0UWDriNaDsZ26M8VYT0KMkU8zwEkf4w1sCthB31o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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