Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf3a347d55bec56b31c0c7d39226865923037b153d91eabde545c60f8d4d7388' 
  AND token = 'ElvWhsCxAAkTFcUSCCXKpOeW8Zp/ZDkY5CFpMAl+mvQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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