SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f4b5f035251b66aa8795274ba1cbfc85bb2a3474231a5f0b8fbe130eceb4975' 
  AND token = 'o463jKC7+JzVJdoK6SABLQqWXGGwQeQoPHGNZqLKVu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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