Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30814369aa1f2d488f1b5d9a8572c2039482438002dd6eea06e947ce594d3de4' 
  AND token = 'H07SzOHocACEIuw4UARDQIkKYGsVLcl/eFSrsByF6lw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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