Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64eba2d368f4e7934e362413de26e947dbe9b0f24140957fc8726160b72b8bc3' 
  AND token = 'c2mVp1XQCwAHkCEU34lpEpqeeH1mve078HJwTc89X/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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