Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8c06d324fe7ed2cb7f7a75d6af1aac80646103d6252f75884cb61690b1bf654' 
  AND token = '0K6M6rsvBCx5sOcrYty8yy+9WuhRqqJyBA2K82GsVlM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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