Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47f10051a3a4e044325fd17b981add224f9de9cc18a1567331ddf03576d40b9f' 
  AND token = 'gnquEbhSUJXc1AfUOvrScEupeMFj30dk/xP6+PxGIeo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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