Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8a5e6e4d712e51f3506b6da0c141cbc142b8c79c107112c78867fab163f0383' 
  AND token = '5B6+cZn0oLL/5IY1yx37foBGYyr7X6Lviw0KXQtFOVk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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