SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a36c63d16080b1a95260d07926266d8c180d514e0fd65ded7179597dd6081a59' 
  AND token = 'yvu6HUoODKHvzjqQvKGbjOLC7fOtpFQkfSxpZMfJ/HA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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