Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7831616d0e69f2327908db4139de565621c0b2e899827afebc5d04b2afd967e2' 
  AND token = 'sqy/5fm+WPg2ZB2GuHfzc2hlS8g74nnPUs2IWFRFiME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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