Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bf252b1711d784e14a9b28480271657f62bd159332e66a553f6d0ada664cb8f' 
  AND token = 'pOh4oexqa66MzqWSeJiqWFWg51t9U0B/3uNUpnP0mjk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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