Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9259b2b373648092131099eb5695d4857770a6737381c4bd07d81cbbdd04e1f8' 
  AND token = 'XLSUDvL8EQZFrueOxigXE45r+vuAzHS7p8TZr073b/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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