Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8740311fdf3d1e775d136a08c54b49a2caa113b86b5b2941db0c81a39b0f617' 
  AND token = 'qvTv5RO1CSAVuJ9pz5lo1ZtFshPNkJkf7DvwHPnr5W8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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