Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e68e07fe5f8182346182de46abb39f751cfe636545fceddf86bdfee99e5683c' 
  AND token = 'FUagha8pHfUAHq/6CwNT0e0kyf0rD/laUHVlXSguEDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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