Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd495c20468147c135abf14a03387db22d5290a71cd5a6beada9fcec81bfdfe17' 
  AND token = '9MURZGLSqEU+oAwnX5uGVdma0XPXhrEALCPH22JdBQs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}