Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6200dd1511ce1db2dc105e5f04ed718d1bdaff6127cb2ecb0175fff4d857a658' 
  AND token = 'nFzqA5Vlj8mTQfJ8qKPrwPqpHMotgpvrcceQKJ7jYB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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