Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a64bbae7feb8d62f8ec47c9231c6efda23fbff3c6434def538ecee05024ab22' 
  AND token = '1b6KzE7Je+LMvbZ0G3hgFEhWs8W1z0UWf0oxmRC/GYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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