SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '478fcc6b229dec96792d78864961bafdc907d6330e4bca56020a17986a7dffb7' 
  AND token = 'JfWK2Xr9Umu2pXF9vLQhjwlVspjc4Ox1fgVrUqHnrRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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