SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '448fa721b1607d7ec39cb705ab09db46f29de63dd0646088c43895fbca27b509' 
  AND token = 'YnjZJTFf/NfpJYYb+UOvgEk3CSlCOA6e5X/GFhOgv9Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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