Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '548b7f0147ed208fbc2758c1a95033e0255b3e39c6606f165792026c0c6f6633' 
  AND token = 'h2xr43C3HIMebZSSuAe9uT9CH1VRNwHDyYgNob67b4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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