Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '9be4f735755edece25a4b32f184b4160e290ae4580267311505bb539b524b13c' 
  AND token = 'XzzJAlk+mek9O/C/XkBefqgtzIru0YXSk37Ok/znLGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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