Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ee13ec2a17a7d0332de6c39d729850db0a5504beed2b69efd5ced31e599583d' 
  AND token = 's2U3hZqh4pxHUhd7xqOG9Csms+Byxwk0ggmz9GtnyVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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