Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3851a3e88c0eb09f9a35affb4c774eed829ec375947dc27df7d7dd580e9b8c02' 
  AND token = 'QsuNm1LxZtd1A8SDbw5QkM6mXacr2Q5sff7SZwSx+7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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