Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29bc0097cc4cb70abfe5689e625ec0358b037c5f4d24a5645582b7045b22f16c' 
  AND token = '/j7LK1WGe0afJ3pnFWJ1pRYMbF5VN4P5mmNd6V2M0cE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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