Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7adcf43d79753e375f89f9336cae1e64116fe2d611f38fdf7f0646df1e6ecc9c' 
  AND token = 'buHukxEjXm7+yitBhE8lNK5lyqqY1hgI5441q+eDdK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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