Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9200c50e12bcbf6b1b3fc1f53d55c340aa383f84d4b285a650e6ec0adb60a735' 
  AND token = 'pqZRynEGMziJBZnsi163eTntcO5fNOBNVmhpm04emHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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