Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '741966a36095ce03c26cbabf01b2264042af5879c6438d1de43c51c627aeb32f' 
  AND token = 'VyorOpstNIxgpSEl+eP6xQv8492pnjwjOb2n9fa3cSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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