Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c12a415247c3d3bd4ae513b534a05925ce3ad65808c0fefd644f40b792b0a15a' 
  AND token = '52jCy9Jgg03UOdsbC+OFEAD9wXgrXMap+mmEAnlp69k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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