Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4438ad9305e0de70aeeba28b945b45863a7f51628e0133bc025d388666717a32' 
  AND token = 'moWoF9iyw4N+/WktquDhdekUzo1/3tl22pA7O3c0vPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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