Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20353f6633a8c60f97ecb3f7bfeffd0e1d174d717837b0611831f8d7cc11fdc2' 
  AND token = 'OEBhvSJ7dbqtPO9bajjKj/eey9bX/3zTfA3OrNrGHNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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