SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86c4b2e00033b1f31f37125463cf49f8b228390ce36df8146bbba80b3201058e' 
  AND token = 'VYqbZ/M4hR7UZTv6l3XBp9V9YbYjmfFydLVaffJ5KH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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