Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9292adf50c7d774205910eb09985eead23f43598018f2bd97a4f1b3430cadf6f' 
  AND token = 'Ih625X7NT826MSbXmUaWcnZFvFW56JR2nm5fYEanJcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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