Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ef3a859c5731be26a576ad36c160a01f9c73af71a5649426d6ce7c52fe4da06' 
  AND token = 'NMc2pLBHDzjjGx6pv3NQ+eD6MNCXpPP5W1BzcRO2LBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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