Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fdf4fdc2d138fc5af40826762dfe2c755cd75bb0d1e431c6ec90ba85954d18d' 
  AND token = 'C0SAqAkX7pliUAF/l3Y1FIMJzh8sn034KjUSSkFEmnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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