Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39c6010cb052cdaabd6947ad5a20cb2e0e2cae79f66c5291d20e7442b89bd272' 
  AND token = 'nLEsdDw86GZhS9SKKTxuyTJww/B8ndsHfDGPZDTWCrI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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