Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '949819e72ebcd609bdb628fdc5c31a600c8ef6593424942db6ee2a8998371e30' 
  AND token = 'DwYgRubwAlC1MO63Jfni89CQQA3MHdOyB5zwyEbie94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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