Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af0381e6bd4ca798d5b4b13663adc5b594f07d31069924e812c6a92c587e6dba' 
  AND token = '87BYKNq8oOyrAppYLInkvPidt2SJEEdqaYanrRcC8dk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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