Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24c4000f977de99d6bcbe2d47868d51125750bb547abed78fb0c1a93e9c9eff4' 
  AND token = 'Vb+K3XMzI7dbeE00bG8zXKe5PqoyxIY5SxidosyOFSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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