Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abcf2d063583cf093e90f43f478fcbebfe599c6cacaffefb118197bb1a8e4649' 
  AND token = 'V1fzuQHTAz4LRVmlXsoB+v5iZQNCibRE/iPQ2EIxvZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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