Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '99a6eb1ca889441fdc3f4308877206e597f9f55275439116f5f3a99c0b50beb7' 
  AND token = 'YlHA61m+ZHFMRtNY2kg3EbJ5p7g4TSx0zivs+uT83Pc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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