Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ca623c3a8770bf85ac803313a1479e59855171395feb268ab1a0a0da848ab8b' 
  AND token = '2si7Sk2ef4x3wjZU+n1sCYIEUTGgENJItMwql33kR0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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