Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2319cbcdb365adcdde3295883eea3218a31de712b36340605872957ae2005ed' 
  AND token = '9sJR4rPhJdsrjzRjNYvOByZqEPzOpWvXsMn1wPhSkmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00064

JSON explain

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