Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '413e398975d85d478e880f69db3804bab5151b46ae4e7e55919b8c9a1ef57b7e' 
  AND token = '61hYZzFPMt32Yn0YtVr2UdZJAjBADgmNkPGkwLHFrm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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