Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dae5c65f8573fd0c71dba405eb225ffa4efc60b545faeedbd98588b40a36f323' 
  AND token = '1LCyD5PKogHvMqW4W4/c2c6JT9Q/4GJTsTpFnSBtxl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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