Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69e8a114b43c2141ab04db8afc24f80d77f9c7e73612cc4de00c19040d8c75ab' 
  AND token = 'jG1kkXxIpSZZ5K3F1OFYiUH2RVf0kRX1Rf+0KfF/YV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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