Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '336417d424de93aa4f6fbb46c9ab8c7be8c9042610e501617efa22269c099a7c' 
  AND token = '0yndck7pUgojW95J+zPbaOBK1Tic0bYWn4PZ539vjrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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