Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdd41054e3c80745663da1db562168134cfbfd3d5b2dadbc90c839aa9b0857e6' 
  AND token = 'uP6335/DRd9E4N6IZohMGwOsppdiOX93ft5XO+8DgTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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