Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b7676bacfaef47d3db67e28d9439b714787139681231a0c0e76f934e53adeda' 
  AND token = '1EmkdhJjnSEZHFreP394TOssTeIjUP4Qy4oXPSSxG5I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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