Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a26129742229b263a84540b4e56578b2c8bc8c4e05011d51adf613aa99c4d42' 
  AND token = 'ZcMp0ZKrFJX7Tqrutxr/4R0Isili7ybEP5lqPn5+TMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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