Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6a57b7b5298411b942c7e300b9c44321781e27d33265ed467b64f18f607e247' 
  AND token = 'bGLBHO2N6/xIJT3gK6Atv/oI1C/XWpa2uvO1GtlLjoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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