Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4755daf4e3839accb8635e467ed12c931f402445b118f601b2f425f25f89c8b7' 
  AND token = 'SqvfHrI644Lv8iLhnp3liS6LgyDOUPW8ExMS6vCd6AE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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