Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8e88f9f52f613462756f64293b4c36a1165a0832900273a20a450b7f95e2ff9' 
  AND token = 'hTtMkJyPte27S0L5gTNtWmFeLCt04sZnEgg+bNuDQ/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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