Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd16e36e31ad7fc48fbf51f14777f57804a84e79df256be2c425c09ae70dfce94' 
  AND token = 'BgYnOnEU7eOMXIq/CMfFa8DyNsU4GTTHq7/Qx4VoTrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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