Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0be0116bb8f4c1a91bcc00ffe79b9bae36ce25bfa724c4306398b62d290069ba' 
  AND token = 'a/URK0ednNrlXnR9yYa0kKHuvqdg2niqpug2rGoKD4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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