Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1311de843085fb0b165a52b87d58ba7ce5281ae315006c73f0dde38022ed2ff' 
  AND token = 'kFcDDMeqfxzXije4brjP0/L9LzrVjqk0iOwQMcyj8Ps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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