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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95ff4a858aa705d2ef3d9afcbf97d0a4b71d94ccc0be9a076762b579b4260c0f' 
  AND token = 'IrbDE45jJVlypxOg4UN2zemOLnD3eIt6Vrj6BxHgXls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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