Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c49c2dce15f7cd0e147ce6ade507366748887f6d9c28bbb971a3513c6f277edc' 
  AND token = '5sdeFLk25juvykCeVrvP0ft1uvC9n8vOlnsl5Hh/0g8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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