SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44917829591700d83dbc1335cff6ee41979a08916032270dcc68a75e91801856' 
  AND token = 'h4bgGofOQKdluGLGa+GqZJh9Jz506YwjnC8QjcK1ccA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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