Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '285c989869b7d25b61ec7eb7d791caf0fd1336b2f9205788ca6813e4d9d200fa' 
  AND token = 'PWHcOO/18XygqhuQgqGHnCRvxoilPLx5eyM0HtIMuPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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