Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b44cadfab102fcdf7215941aff20dc456652bf62caaf002cc8908f1f16ac2a9' 
  AND token = 'nNb6PgUmtuop9p8erL8MwBKhSz7kMOk7cOyQQ3q9Plw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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