Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ceb78d3b55f3384ace917ef3c4825c4b3c81ae269826bc34c7fd0d425c0c5aa' 
  AND token = 'w3mvQEGeXM/gGa8kgxc4hBz3O2zl6/bwEbYp8l8Myi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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