Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c26a7bfc103ccb7a6a805742d1486dce55a864731eccde4fdbf2da0db185ea44' 
  AND token = '96Ilq78xA2h3qvf0ru4CR3/etizjAafLkcggNkbTfbY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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