Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19300bed5ccbde3dda728a05a99a542bc77393b90f5920963e8af62313120a7b' 
  AND token = 'j23LlFD6vaAVH4vesE3140nGmREc3eqCywlNuartQNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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