Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89b53205955b18c50a87efbecf22c3cedcbc9cd98a1ec0a2a613e03c294ce338' 
  AND token = '4O7yvJK4K15Y/OvONUApbKn7r6uHg1tob2tMdsTZgf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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