Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52897129d8081a459f0b9346ee1bdfca5437ac39604b03b2f676f6a2587eee7b' 
  AND token = 'V4VCh1Aon1NoOlzT7VikkUOjDD9x60ybV5Sm6qs5haA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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