Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13e01573ed745a60a4771c9247161a223ddf2c324b35efe752077f207a81cd1a' 
  AND token = '5Qk1bdsNQkwkZ2zTbFzcL0APp4yEV15IOA+hbptX1BM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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