Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '533cd9be97e9953d0870f106e071da4eeb2b0b80e561228cace7aec68f1eaf80' 
  AND token = 'wSIU/mkttWmna+Teiy0E9IUIWimlnOdTG/GHoWxe5AM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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