Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45dc5b51bd0c0b161e63e743ca9cc9058dc57a7fb24ee4b6f191bf79ae685003' 
  AND token = 'zd0NQv3+2QKPPOvOLL/zMrzTSFO/5r/r8dZH9h1HVWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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