Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c185639575e938af7e02233a21edf4f67b7e09252ac4cc3bfcb3d7832568114a' 
  AND token = 'SFzqiOOfd8p9KW7NPN8GcogIe/ZkzkvkTI1Zj7hIvb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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