Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '927c1414f8ce533fd141330818eeb3371d360db11379d6a8c240db8d19de4b4f' 
  AND token = '//0rDqOhp/ACqcZqVN9by9pg7v2L+vJRoqkKv4wZOU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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