Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '323e2ccaacc72c50df2522b1f41e8cf98ad3bb32836810c0352b27329dad1229' 
  AND token = 'AahgRe9m0NQJPxUuotoA9cV4e4DClDHf/lW4G3Ylumw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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