Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64c3f8a9c9c29906d2b9e47e82f169f2f52f6a69627f556735e0167c4e6edaff' 
  AND token = 's2jQoWYxQNpp0dP/kjnKFhD9IQyoa8ZjA4lqyfV25mc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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