Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ebc9caba413cdcd6a62b4cb141faedb52563492156304666e93b532fc522e13' 
  AND token = 'MUWp3Dxt+sRS9mbDpUTnqR3pNwZZ4R/AuK00F1q66qE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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