Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cdcd3bff4722efac9c927fc468630e0c62ea67e28d960157838dd8c46184636' 
  AND token = 'KDpe70nI7/6RlE8VWeewLjuJja4LXSp0KSwiQf0BHDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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