Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cacd6163a1d7260a68addad71a03446d57bed66df16888771d63e394cf32a611' 
  AND token = '08tAA4HunHUPS3zN+Hx07tEHAej9EX1WpIb3l7XzYLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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