Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c8fb8b6c5a8e2208916fd9f39aa14e7600c15098028e00615ee34ddfb18c157' 
  AND token = 'JcCGOtVlb5rPaPxv52a1ubCA5y44MB/YAvxeqLkSyTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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