Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca7cd1e33a24cd2985a706b313165be082625633c6355d716b61cd54356a5aaf' 
  AND token = 'YGFQnYxGRHmsPZdID3xdjnmfPo5D56VKMmQxczhjMxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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