Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5864e5ca764d6852e6a9b283cd39c42f79d97fc682a01185bec5de7bd9cb132d' 
  AND token = 'nVddN3IwuMeDrtLNkM21YuWqBTx74JxAczFzoBoKoFI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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