Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78ca30349b742ceb66f22c91e5c2a8b1127a0b3894523fa67e0dc3ffe95d623c' 
  AND token = 'KlvEHlX1n68llok2J0pHEt06SHtMnbU1ruhiarNdOgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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