Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3ed6c1fec3bbe6680159a579abd63fb6f9d420e5b0b8e76ffdf75d5f4697ad30' 
  AND token = 'S663DMaXWsVrG+03hlD7FozBg1K3dNKnEQLcV/yI9g8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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