Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a2c4c142a68effdd5429b0624132812cbf441e2c5ef91c334f65f48c0dc95c8' 
  AND token = 'gx0Ayv1PfpwpYss+hZHJWZy/eYxbK5hy7dri8ncUPio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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