Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4444b6db0d700c36c633032ac6b0ff7fffe805f8475a6df97e09aab191ec558a' 
  AND token = 'zOwRMaMKr8hzez7Ftrtr087bYkLmRoLcEq2lavKvf1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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