Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f614e73d366bf356a6387b844f122672503c651aef69a27a0ac374fc08613df7' 
  AND token = 'jZ5VEwtZ2cbBptMqRiCe4bP6H0IdOnoQJXEUIGBmqT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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