Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53ee08f44b9ace97c2ab0a92af37cf941119595bbacda9b74aecf9cb71104b01' 
  AND token = 'bxvoJy8T9rdIykkmbVRrsC51UkRwkylEU2r6BJPh544=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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