Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c85bc8a19e1b8c9be1de1ff4323273279119321d7da633095056964fce818cc' 
  AND token = 'uhg1neF54bLNluaM2HiZvI9ca5WmVKGCqKkLLzlReyU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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