Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ec766e8848b5ba8406b5fb5e3457302114ae297c882058149e21ac0a2234273' 
  AND token = 'gGQpJRuKEopWotHPibE+F74lRHOfi7ghmNP2vkmAPZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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