Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c13f1c3f9b8d337763eb2a1857ee2e6cd4b032a156240225cf15dba96905ec6' 
  AND token = 'czzeOS0GkWv4fOBaqAxRpMl66zFoUDD5r8BPB+5KNOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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