Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4c456001240e70916201fa4eba279c777c6f152e592cf5a519def21f4522689' 
  AND token = 'G/RJyX41AP01Alz1EiNcct2O40VQy10V60XrTg91X4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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