Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ac83ba2dbbc439ebd54cc12a16ca96c9e5275a343333f88661a9c1e0d582854' 
  AND token = '2zvBPvv8J5nJQRNA9DS3C10btfg3briO6rha0TcDeeM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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