Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9844ad287ec0210a8e20f8d7d7e697373e631c9eddbaf4b85fde90ad902bf9c8' 
  AND token = 'QLgGpJSe3E7008XaxAxk/sO2kgpfq7Pe18YZ0stRZYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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