Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9d7f9b450e69d7f9bb0a95e7d5cb65cc62aa9f858cc4a0487b89e1cd1d14869' 
  AND token = 's9Fwk5ufS/iaFNSgcuiewitVfwxuiYFomcXzKyy04ek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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