Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3048b18e31ea5301d1edab1129a1fcbe2ad1e13cb99c64b70dcca1b4127d86e' 
  AND token = 'VQThBFsN2Irzpo1p3x6Ok8kONddXg0MFkngLjbg40ng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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