Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1e961bb20b424b1b58688bffffba3b82cb31a7bf32eb0dc2aa1a3cd74cd9e60' 
  AND token = 'qzhz6COSvpSNvaWaaco+Y6ge6Awo0I/ZVwUP/jNMJIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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