Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6c7735ec2843d8e9345ea69fc7db221b65547656baae747928d4065594cebbe4' 
  AND token = 'NVOWBEElc0aQmnFZw5spltU/AFw6MLFMzQ3TsF559ik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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