Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f237ffb0ae1238b9869c87d4d93299c20b5414458845a88b14ca57e9c530bbe' 
  AND token = '5Cq1VTq3TYhfOFTvLGdno7jxfy6R31ZeMRHPer+jbjk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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