Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7ca579c9583b28b92cef78a2dedac3905ab438c6e2bd2df0e37a24e463861f6' 
  AND token = 'bmqWvhpQ3TyHmFwQuGm5qEK6otDLXEC6MBSTFHdTNk0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}