Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82a2c434582c3258bb3adbfe174f9fceb3ac63de1e3124a15b0bd2588b272efa' 
  AND token = 'niROuekXO7PPkepHeCG0sWwsuWYU9gTKp7i1ZAo19iM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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