Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b19ccafd1605a423b8b26df980c93261812baa1347d6b6a1fb63963ab2a186cf' 
  AND token = 'aF4PoDmwALH1X034hshiQGnb94bSGOQY5oDByzuUUWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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