Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29888387f637951d84f213cc41ba33b85a8054a61d90911bb6d165d8710beeb9' 
  AND token = 'M+X8NppaeVE24y4FKv8bxtauwAlwyrVoC4jHjGrFgWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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