Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc646727ede457057952f51a4bd622ad4c4fcf7f27f74c3ecf5e64950872f4d3' 
  AND token = 'mBaUUSOopJgph9W2fWy2xu/n5+7Vig7o6AsCy8xzr18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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