Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93973766624650895bb066ec766ad62ab8da6ea3999a6a17280b8ba49c132a56' 
  AND token = '4k3Dqqx25qLHNDKwGa5oazBj7ipxB7MzosIAKCQL3ck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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