Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e8be8a2b0f5e10152dd031fdd95ad3f62fb071255c8599385cad13df0d02e428' 
  AND token = 'WZytkzMZOx5RdI4eWX79HDd0HH0ghruA/scF5yX9MUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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