Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd84d0b29bf89b9c3b7936afdf33b0eae959fed286d78a349b755e80374cedcac' 
  AND token = 'Ltvrx/AqsxV674n0vXxDaJ9HtA+7Orli8iHbGqVUv8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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