Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7568d70cadab202f4c26f79588b2adbc657aa517114333b43a7f8038d39c06f4' 
  AND token = 'FZFG91L5rzdWLE3eFa755OTBrp92oSc8dbMKtGUsJYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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