Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e1dd56c423640106a210299661d248aacc06695de4c27aa441fb87cdc0bbbdb' 
  AND token = 'IvJuyitNo/cJuf8l13bNMkdr89pTrd88gxyaxK8TfQY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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