Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '224a41ffb804007a6d5e50d8f744e90160f623b61ad85528bdbff27acb52128a' 
  AND token = 'Ll8qYvLxq7Ig1dcbqk7gUjrc47wNpfBSHBdU7NDZun4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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