Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2702956d29c9830c0c11d48210b2f7e14312b0a21b946177e1356a923c6ea168' 
  AND token = 'Kw6khQE7sq9kbeMa1wxy5bcXH/vmSUQq9BmO77PaoM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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