SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e933780f8e115d1098fa3af1f1f1c9ed6914a1a72d08635a4a4e163d86c1fd7b' 
  AND token = '9+Z/96kw915yGhibBlvLbFEAHVbSf3g+Op2yjCleQYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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