Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '869360b21252c04e790f3454f57be9bb5e7c904543d98687a93a0ae612b6a4a5' 
  AND token = 'JaeufcE9hIcb0I24Rr+PfezDtm9Mkc82jTWegIUX1lA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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