Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a561ea913321d6cb923f90da38eedd5bb98c304c55d4160a63803d4e93d359b8' 
  AND token = 'rTlHzsthv1bhGE8v7QBkz2mwPHMoQEvzdWMseAmtWiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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