Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63c4794f4df68d4d2eae3ea8da82b987441d3e9d838697c1e23b0062ccdb9c97' 
  AND token = '5M9RRk1dpZ+HjVGVKSwQIXLgcfC7PV19aa+KHKDQHh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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