Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1eca9899008a11489e95cdfb5d3a84e8d0fd516418a9f3c1335b8ff3a365627c' 
  AND token = 'w98EAZD8M29Z+d0MIlL5hAVDPk9ZHrEVJlf5ZH/WnUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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