Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '559e09fab846f7fe726ec5ae3274e6c34fd1aa2962c93d1aa7934aaf9288a552' 
  AND token = 'IRNpyXHaiH1IWlm34yuYIyYUQZjQQiaWx6oE0huw6ls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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