Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd8abb4343207da3b7e0ea8c0dabcf22c3a1950acd4f74bb9d680d62534481db' 
  AND token = '6t5nXvNG1EEG1mFff22WCN1iKdR/PpGv090hIHHx8II=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}