Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6688e05b9836e70fd9a605ba722ae9913ad4d8062a2874170035dfc7a69f49d6' 
  AND token = '6+HfeIW4Y3ZO7Cg5ORJoO67fZfZC95LFexSESd4W45U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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