Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4621d8731e117d82c5d2c845c2fab8272fab4d72e8a5aa7479909cd50bf8229a' 
  AND token = 'WB1gCMQUprBMVqeG7AbFLAorIAW+hTr4AD07y1NZnfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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