Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ee9946e0b31e898982d2bca547fea3611e690918d42dd2c8d999ce19f334ca5' 
  AND token = '3Os5weLqPr4Yvhk5g2z/g42JZQ76bWBwpNd3RmmHNJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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