Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86e4bea15ef4a2c7e843233465820af2a6a3e85b18d1560983e67672f6e95cfa' 
  AND token = 'EjHS1xFM4Gkq6ak4OQFAwpGe2B5A9501seTgJDpjRas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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