Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b2a75e5c0528596f412ce20a60941d0a3a45ed5ead4ac89e8e563b38d6a7a84' 
  AND token = '4zsO9b2F3AzMOEYfmZxYZeezRUfYhE8B3nMfMSPI5Lc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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