Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fc0d0f7a002bfc24931bb09080153814db7c6d545e579e927db336b296b7469' 
  AND token = 'qV2cqllglicAQgj5ZYMCcydylCCYTvvACfd+LgGllQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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