Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d5b15243c5304cf945cfa77cca5b8cf41f79dbae8cb86396f742886f6625204' 
  AND token = 'W6k+h6HfnixjQ+3MpZ1ffjXSkqSKKsRIm8xTS8XFxnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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