Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e75b67fab46839554d9439aaa45734cba2fc071e0efbc7d27483f71b5046a76' 
  AND token = 'jh5+hv39YP4Kj3U2HbiTpe45sadRjrTQBLwB0plfvOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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