Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '027ef7edd1662460d0d99517f030543b8346e2355b686a3c7037ccb1c38aadc6' 
  AND token = 'F7BallBvgIh0bz9gO95y4AKEb2xlW1h/LffKELhd6TQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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