Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdae3a3d68f853a0d7026a0cc845b10f109700b73f5e42d36ad74a8d13a9db99' 
  AND token = '58OsvnKbj81dxTsEgTvvrvvTae3wO8rXDYUXADy7/Zc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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