Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36290d430a79ab15c93dd692763eed26d004a29e66b6dc8af559f8ba274f5e4c' 
  AND token = '3F2/O1IN+dnu0D6oNS16XNuENdKUcRbt/opfwTS7eRM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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