Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93e4caba67c28ea428c95913b8c9cb604221dfcdc6bdff7e8b55eadbb9a4aada' 
  AND token = 'QxxK6/N5REke30IaqLPyWyADVJhudrby0wYzwsYWNDw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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