Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '441ff65bd83d9c78f1fc8b95624a2c991c69e6859af81b3b8660328ec6234223' 
  AND token = '+TU0rnLJka+oSk0iCoqoWmIEI73pzKOLk+fDm7QqxDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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