Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a60504f739f68b1a47880158ade29fdc890221a689d3980ef82947f2ce1ca3e7' 
  AND token = 'YIEFDnIHcLLNijycZxKfAjGJpThfkeQI3W468nsfdqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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