Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e8449e33e15af7d1b630c9396893901a3a896f5edbcff5b0ce8c58118387473' 
  AND token = 'KP09wKOQj3Lv82u4rCDLP8WTvN5i35lXz/diwv2X66c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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