Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67339aed3aa0902c954a2e19f4548b9de3502686fafcf09f01dbbbf0bed79e90' 
  AND token = 'c1ofnC98qfIFP313SCqraPqFXgBYOVie+r2w/4WcVCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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