Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d3b16c1f28e26292bc0afa9a2a79e9330a61c63ea51165a198968f0ada1229f' 
  AND token = '/lbguyZva+UE+lQBTOtP8KNw//q2Y+xzFEPbjjuoscM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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