Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01adee30b0c215da3a77c1c4014b1553c7138a905e09704e4adb18f011a59c55' 
  AND token = '7WLQHwRGwxXjY/3MhJdA5egwop6CGp+f4UdIIwwbuTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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