Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af85bf815e5bf58a3b2b6568f2f704ba4a0d3510fe2ffa3f84b2395ba2536a88' 
  AND token = '6lGQevv+vPt95+oS35e0OxO4R7dIC2psSMZwg0WPS2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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