Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72acad0ede44309baa1e8fbfb6003d3d481191404d5d0da979b1eaaa8aa49b73' 
  AND token = 'XnEvJca1WOUPTHKOujoEuEsutgzw0S+e9vhjQ3VPErc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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