Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be3d79d12e58e1c0ea2477861b77778a836ca126542ba4a4f072c3624f7f79b6' 
  AND token = 'S/y0AbHJTo0sfY/o6HGZbgWFlYuFR3Cg6Z0XHmORrbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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