Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79ab092244e7163a98b0cd72e1d038b72a9e8352d6c1bed2b6186600bd70464f' 
  AND token = 'ETLToVIy1tCnXw3QG+o3Bi55P9b/DJv+VKoP6IcX6Ck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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