Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f691d11e9bef1be1c7ab198dce4315f1b6f7075aa393c64a9741380c67556af' 
  AND token = 's49Kd8z6O+gG3nDnq8VHeyJAymFBtSUtL2vzWoEXxMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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