Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2b099ed4f7ef2ea3c76b873ce4484de2ecd2a5f7187b95d34807324f15550fb' 
  AND token = 'v24aEEWcnt9+q47AdkTB1y0IGddtkxZxOmd7gZqZ0eI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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