Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '103505ae112f98d2558f2dffc2dd963cfbb3492bd051e0a972b9174b15454851' 
  AND token = 'Lhzcwog1P76cBRLDHeyh5x0wh2vel6S4hLyD7sU3Zuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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