Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '883c4964f2fffcbb6a5437290894df975cd1677f60ee2c83ae2941b221cd7ef2' 
  AND token = 'xYSpXAXkotY+W+NU1v7URID37dGnkwfzB01DQHRk2g8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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