Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '386791dfd77bf137c7f65470a4097cea11a1722fcfbcf299a9a001dd4ee601c4' 
  AND token = 'HRjrMTxCUZ1l3roJYzgWis6J7yhfV0UeZVxMjyeXhtw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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