Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c3f02a45f91afd8e2c02f4e5453a8b8754309ef14888ab6f4a260ef527111a4' 
  AND token = 'yHekNhpv6gVlnwWHQqtOQk9S0IssdpB5kK95AW0DxFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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